1. Nf3 ... d5 2. Ng5 ...Qe7 3. Ne6 ...Qe6 4. Nd8 ...Qxd8
interesting puzzle

1. Nf3 ... d5 2. Ng5 ...Qe7 3. Ne6 ...Qe6 4. Nd8 ...Qxd8
What about the missing Black knight on g8?

I got
1. Nf3-Nh6
2.Ne5-Ng4
3.Nxg4-d5
4.Nc3-Bxg4 and
5.Nb1-Bc8
But it doesn't make sense. A lot of this puzzles are not for a reasonable game. I saw one with a castle in a end game, but some others are good to think about it :)
The puzzle is to get to this position in only 4 moves. :)